Two new 3D metal-organic frameworks of nanoscale cages constructed by Cd(II) and conformationally-flexible cyclohexanehexacarboxylate

Hydrothermal reactions of Cd(NO3)(2)center dot 4H(2)O with a, e, a, e, a, e-1,2,3,4,5,6- cyclohexanehexacarboxylic acid (H6LI) generate two new 3DMOFs with nanoscale cages, in which the L-I ligand in the first MOF transforms its conformation to the e, e, e, e, e, e form while the L-I ligand in the second MOF transforms its conformation to mixed e, e, e, e, e, e and e, e, e, e, a, a forms in a 1 : 3 ratio, showing the effect of the auxiliary sodium ion on stabilizing the intermediate conformations and on the construction of the heterometallic MOF strucutre.